"And here indeed I have been often put upon a serious Consideration, how such a Heap of Pultis like Matter, a kind of Quag or Bog, and which as Sydenham observes, carries so little Analogy in its Form, and appears seemingly so unlikely to manage an Office of Intelligence, should yet be qualified ...

"Or that as the Rays of Light from the Sun are instantly transmitted to all the sublunary Parts of the great World; so hence the Sensitivum Quid, in like Manner, through the nervous Tubes, having here their Origin, should as suddenly as those Rays darted from that great Luminary, be likewi...

"[O]r that hence, as swiftly those imperceptible Messengers called animal Spirits, should, at the Nutus Animae, rush through their Meandrous Paths like Lightning, and having dispatched the Mandates of the Will, as speedily bring back their Errand to the common Sensory."